I believe Canada follows the same or at least similar laws as the US. Here is a little info for you:
To say that it is not legal to sell over 5mW lasers is oversimplifying the situation. I'll try to make this brief:
What we are talking about is what is known as hazard class and for the moment the only two we'll talk about is 3A (also called IIIR) and IIIB. A hazard class is determined by how much laser light could fit into a 7mm diameter hole (the width of the human pupil) at 10cm from the front of the fixture. If that number is over 5mW, the class is IIIB and it requires a license to sell and another license to operate. If it is under, then no license is required however in either case the FDA has to approve of that laser being sold to the public.
Therefore, if you take a laser like an ADJ Galaxian which might have 50mW or more inside the housing but the beams spread out super fast because of the diffraction grating on the front to make the "star" effect, it can be 3A and not require a license because the laser field is much too wide to all fit into the eye therefore making it safer. Take away that burst grating and you have a 50mW beam which would instantly make it IIIB. Scanning the beam does not count as making the field "wider" unless a whole lot of other stuff happens which jacks the price of the unit up into the many thousands of dollars. That's just the way it is.
Therefore, if you have 300mW anything and don't have a license to own them, you are committing multiple Federal crimes because you probably also imported them illegally (as in eBay) and each seperate use of the unit is a new infraction.
Google 21CFR1040.10 - This is the raw standard which governs the use of high powered lasers and tells you how they have to be built - pretty sure yours are not because I know this market very well and I don't know anyone who has a legal 300mW like you describe.
Google 21CFR1002.31 - Manufacturers have to keep records of their quality control checks to make sure the lasers are safe for use and keep those records in a way that can be inspected by FDA. That is why laser manufacturers are required to have a US presence so that those records can be kept domestically and someone can respond to service issues. Otherwise, how is the FDA going to inspect a thousand sheets of paper in Taiwan?
Here's the kicker:
Google 21CFR17.2 - If you scroll down to the bottom and look at 360pp (b)(1) you will see that the Federal fine for violating one of these sections is $1,100.00. You may also note that it is per violation, per person. Each day of ownership or use constitutes a separate violation so you are on the hook for some ridiculous amount of money. The good news, is that they can only fine you a maximum of $355,000.00 for a related series of violations.
Go to
Regulations.gov and type in the name of the laser manufacturer. Actually read what comes up because a lot of the docs are customs stop orders and whatnot. The manufacturer has to have a license called a "variance" to sell their products in the US. If you can't find that here, you have illegal lasers and you have opened yourself up to a ton of liability and, worse, posted it on a public forum indexed by Google.
Good news is that the FDA isn't going to kick down your door and if you get rid of the lasers you will probably be fine because they really only have the resources to track down people who are currently breaking the law.
(this was quoted from a reliable source (X-Laser) on DJ Forums.